Roll-ramming apparatus.



H. P. MACDONALD. ROLL ,RAMMING APPARATUS. APPLICATION FILED AUG.7,'191A2.

Patented Mar. 18, 1913.

IN V EN TOR.

WITNESSES:

H. P. MACDONALD. ROLL RAMMING APPARATUS. APPLIOATION FILED AUG. 7, 1912.

1,056,565, Patented Mar. 18, 1913.

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UNITED STATES PATENT OFFICE.

HARRY P. MACDONALD, OF MONTCLAIR, NEW JERSEY, ASSIGNOR TO THE SNEAD & CO. IRON WORKS, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ROLL-RAMMING APPARATUS.

Specification of Letters Patent.

Patented Mar. 18, 1913.

Application filed August 7, 1912. Serial No. 713,927.

To all whom it may concern:

Be it known that I, HARRY P. MACDONALD, a citizen of the United States, residing at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Roll-Hamming Apparatus, of which the following isa specification.

This invention relates to roll ramming apparatus and particularly to the mechanism for supporting the roll during the ramming operation. It has for its primary objects the provision of an improved arrangement of roll ramming apparatus which is simple and compact and requires a minimum amountof head room; and the provision of a simple and effective arrangement of track and supporting mechanism therefor in apparatus of the character described. These together with such other objects as may hereinafter appear or are incident to my invention, I attain by means of a construction which I have illustrated in preferred form in the accompanying drawings wherein:

Figure 1 is a side elevation of my improved apparatus; Fig. 2 is a section on the line IIII of Figure 1; Fig. 3 is a plan view of a slightly modified form of the invention; Fig. 4 is a section on the line IVIV of Fig. 3; and Fig. 5 is a side elevation of a detail of my invention. Fig. 1 is a partial plan view of the apparatus illustrating a detail of my invention.

In roll ramming apparatus of the general class to which my invention belongs, the sand in the flask is rammed by passing a heavy roller back and forth over the flask, the roller being carried during this movement on movable supporting tracks which are adapted to rest upon the top of the flask and which are pivoted at one end in order that they may be elevated so that the flasks may be readily taken away and replaced. This arrangement of parts obviously re-- quires not only much head room but also overhead elevating mechanism. It is one of the chief objects of my invention to provide a supporting track mechanism which is very simple and easy to manipulateand which will require but a minimum amount of head room, thereby adapting the device for use in factories having but little overhead space.

Referring to the drawings, it will be seen that I have diagrammatically illustrated a ramming table 7 supported on the floor 8 of the foundry and adapted to support a mold flask 9 in the usual manner. Adjacent the table is a supporting framework 10 which is provided with the tracks 11 adapted to support the ramming roller 12. The table 7 is also provided with tracks 13 which, when in operative position, are adapted to aline with the tracks 11 so that the roller 12 may be advanced from the tracks 11 onto the tracks 13 above the flask 9.

Referring particularly to Fig. 2, the general relation of the parts is clearly illustrated. As there shown, a pattern plate 14. is adapted to rest upon the top of the table 7 and the flask 9 is adapted to rest on the pattern plate. The tracks 13 are pivotally supported on the links 15 by means of the brackets 16 and when in operative position, are adapted to rest upon the top surface of the flask, and when in inoperative position, are swung to one side as indicated on the right hand side of Fig. 2 at which time it will be obvious that the flask 9 may be readily removed or placed in position as the case may be. The links 15 are pivoted at 15 adjacent their lower extremities to brackets Hand 18 secured in any preferred manner to the table 7 and adapted to support the links against lateral movement. The links 15 are locked in the position indicated in full lines in Fig. 2 by means of the removable pins 18 which are adapted to project through apertures in the brackets 18 and 17 and the links 15. This arrangement provides a rigid support for the links and at the same time permits of the removal of the tracks 13 to a point entirely out of the way at a point below the top surface of the table 7, as indicated in dotted lines at the left hand side of Fig. 2. This arrangement is particularly advantageous in that a rigid support is provided for the tracks 13 while at the same time provision is made for moving the tracks out of the way when it is desired to use the table 7 for ramming operations other than roll ramming.

It is further to be observed that the links 15 are inclined outwardly and their end portions are out-turned, the purpose of which is to provide a guiding means for accurately positioning the flask 9 as it is being placed on the pattern plate, the inclined surfaces of the links serving as guides. By this means the flask may be positioned in a short space of time and with less care on the part of the operator. .7

The end of the tracks 13 adjacent the sup- 5 porting framework of the stationary tracks is supported by a similar arrangement of links and brackets and also by means of the ledge angles 19, as clearly indicated in Figs. 1 and 1 the latter being a partial plan view of Fig. 1 with the tracks 13 broken away for the purpose of illustrating the means for supporting the inner end of the said tracks.

It will be observed that the roller 12 has grooves at its end portions providing flanges 21. The tracks 13 are adapted to project into the grooves and are loosely engaged by the flanges 21 which serve to support the tracks 13 against lateral displacement, thus relieving the supporting mechanism for the tracks of any undue stress. This is a feature of importance inasmuch as the tracks when in position on the top of the flask, serve as a sand retaining frame adapted to retain the sand over the flask previous to and during the ramming operation. It will be readily seen that as the roll passes over the sand, considerable lateral pressure will be exerted on the tracks. By the above described arrangement, the roll serves to buttress or support the tracks. The roller is provided with axle port-ions which engage a yoke 22 of the operating rack-bar 23. The rack bar 23 is advanced and retracted by any preferred form of operating means. The roller 12 is scraped by means of a scraper 24 which is mounted on the yoke 22 and presses against the roll, serving to remove any sand which may adhere to it in the process of ramming. This arrangement is particularly advantageous in cold weather when the roll is chilled and damp sand frequently adheres to it. By keeping the surface of the roller 12 clean, the sand in the 5 flask 9 is evenly rammed.

Assuming that the roller 12 is moved to the left and is supported on the tracks 11, the operation is as follows: The pattern plate 14 is placed in position upon the table 7 and the flask is positioned thereover, the tracks 13 at this stage of the operation being in the position indicated in dotted lines at the right hand side of Fig. 2. The tracks 13 are then rotated until they rest upon the top surface of the flask, after which the facing sand is riddled over the mold and the flask filled with sand. The roller 12 is then advanced and the sand in the flask is rammed. After the ramming operation has been completed, '60 the roller 12 is retracted and the tracks 13 swung out of operative position, after which the flask is lifted off and carried to one side and the corresponding half of the mold is completed. In order to facilitate the operation of the tracks 13, I have provided handles 25 located adjacent the outer ends of the tracks by means of which the tracks may be readily swung into and out of operative posi tion. It will be noted that the tracks 13 are preferably formed of angle-irons as there -is thus provided a simple and inexpensive form of track which will engage the roller 12, and retain the sand in the proper manner and at the same time afford a broad supporting base adapted to be carried on the top of the flask.

In Figs. 3, 4 and 5 I have illustrated a. slightly modified form of my invention. In the device herein illustrated, I have again provided movable tracks 13 but in this device the tracks are not rotatable about a fixed axis but are mounted for reciprocation in a horizontal plane. I accomplish this by providing brackets 26 which are secured to thetable 7 and which are provided at their upper ends with hearing blocks 27 upon which the plates 28 which are riveted to the base of the tracks 13 are adapted to move. The plates 28 are provided with slots 29 adapted to engage the pins 30 which are threaded into the bearing blocks 27. Intermediate the ends of the tracks 13 I have provided similar brackets 26 upon which are mounted internal cam members 31 which are pivoted to the brackets 26 at 32 and which are provided with a cam slot 33 adapted to receive the pins 34 mounted in the bases of the tracks 13. The cam members 31 are provided with operating handles 35. When the handles 35 are swung outwardly from the position indicated in Fig. 3, the camming members 31 will draw the tracks 13 outwardly. It is to be noted in this connection that it is necessary to provide camming members in the central portions of the tracks only inasmuch as it will be apparent that even though one or the other end of the tracks 13 move first, upon the completion of the movement of the camming members both ends of the tracks will be in proper alinement inasmuch as the movement of the tracks is limited by the slots 29. The ends of the tracks adjacent the supporting platform 10 are provided with plates 36 which are riveted or secured in any other preferred manner and adapted to bear upon the top surface of the brackets 37. The ends of the plates 36 engage the under side of the tracks 11 and thereby prevent the tilting up of the tracks 13 in case the roller 12 is advanced to a position beyond the end of the flask 9.

The supporting brackets 37 prevent tiltingmovement in the opposite direction when the roller 12 first engages the tracks 13.

It will be apparent from the foregoing that the apparatus is not only simple and inexpensive but requires a minimum amountof space and is easily operated and does away with the need of complicated overhead operating mechanism previously referred to.

Other advantages Will 'occur to those familiar With the art.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is the following:

1. In a roll ramming machine, the combination of a flask support, a pair of tracks mounted on the support and laterally retractable from the support, a ramming roll to engage the tracks and ram the sand in the flask, and means for operating the roll.

2. In a roll ramming machine, the combination of a flask support, a flask carried thereby, a pair of tracks mounted on the support for relative lateral movement, a ramming roll, and means for operating the roll, the said tracks when in operative position supporting the roll above the flask.

3. In a roll ramming machine, the combination of a ramming roll, a support therefor, a flask supporting member adjacent the support, and a pair of laterally reciprocable tracks adapted when advanced to operative position to aline with the roll and support it over the flask supporting member.

4. In a roll ramming apparatus, the combination of a pair of tracks, a flask support adjacent thereto, a pair of movable tracks pivoted to the flask support and adapted to aline with first mentioned tracks when swung into operative position, a ramming roll adapted to engage the tracks and means for moving the roll.

5. In a roll ramming apparatus, the combination of a pair of tracks, a flask support adjacent thereto, a flask, a pair of laterally movable tracks mounted on the flask support adapted when moved to operative position to be supported on the flask in alinement with the first mentioned tracks, and a ramming roll carried by the tracks.

6. In a roll ramming apparatus, the combination of a pair of tracks, a flask support adjacent thereto, a flask, a pair of movable tracks pivoted to the flask support adapted to rest upon the top of the flask in alinement with the first mentioned tracks when moved to operative posit-ion, a ramming roll carried by the tracks, and means for moving the roll.

7. In a roll ramming apparatus, the combination of a flask support, a plurality of brackets arranged on opposite sides thereof, a pair of tracks, pivotal connections between the tracks and the brackets and a roll carried by the tracks.

8. In a roll ramming apparatus, the combination of a flask support, a plurality of links pivotally connected to the flask support, a pair of tracks pivotally connected to the links, and means for detachably securing the links in fixed position.

9. In a roll ramming apparatus, the combination of a flask support, a plurality of links pivoted to the brackets, a pair of tracks pivotally connected to the links, re-, =movable pinslocking links into fixed position, and a roll carried by the tracks.

10. In a roll ramming apparatus, the combination of stationary tracks, a flask support adjacent thereto, a pair of movable tracks mounted on the support, a roll adapted to travel on the tracks, and means adjacent the ends of the stationary tracks for supporting the movable tracks as the roll rides from the stationary tracks onto the movable tracks.

11. In a roll ramming apparatus, the combination of stationary tracks, a flask support adjacent thereto, a pair of laterally movable tracks mounted on the support, a roll adapted to travel on the tracks, and means adjacent the ends of the stationary tracks for supporting the movable tracks as the roll rides from the stationary tracks onto the movable tracks.

12. In a roll ramming apparatus, the combination of a grooved ramming roll, a flask support, and a pair of laterally movable tracks mounted on the support and adapted to engage the grooves in the roll.

13. In a roll ramming apparatus, the combination of a flanged roll, a flask support, and a pair of laterally movable tracks mounted on the flask support and adapted to engage the flanges of the roll when moved to operative position.

14. In a roll ramming apparatus, the combination of a flask support, a flask carried thereon, a plurality of arms secured to the flask support and adapted to guide the flask as it is being positioned, a pair of tracks pivotally connected to the arms adapted when swung into operative position to rest on the flask and a roll mounted on the tracks.

15. In a roll ramming apparatus, the combination of a flask support, a flask carried thereon, a plurality of arms secured to the flask support having their upper ends deflected to guide the flask as it is being positioned, a pair of tracks pivotally connected to the upper ends of the arms, and a roll carried by the tracks.

16. In a roll ramming apparatus, the com bination of a flanged roll, a flask support, a flask thereon, and a pair of laterally movable tracks mounted on the flask support and adapted when in operative position to serve as a sand retaining frame, the said tracks being engaged by the flanges of the roll.

17. In a roll ramming apparatus, the combination of a roll adapted to ram the sand in a mold flask, an operating frame secured to the roll, and a cleaning scraper mounted on the frame and bearing on the roll for cleaning the sand from the surface thereof.

18. In r011 ramming apparatus, the com- In testimony whereof I- have hereunto bination of a flask: supporting means a flask signed my name in the presence of the two 10 carried thiareby, a ramming rpll, and a movsubscribed Witnesses. able tract mounted on 't 1e supporting T 5 means adapted When in operative position HARR1 MACDONALD to support the roll over the flask, said track Vitnesses: being laterally retractable with respect to J. F. ARNOLD, thefiask. C. C. GREENLEE, Jr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

